Core cap remover



Sept. '15, 1953 G. w. WALLENIUS CORE CAP REMOVER Filed March 14, 1951 sSheets- She't 1 1N VEN TOR. George BY I Qgwf.

Sept K5,, 1953 s. w. wALLENius CORE CAP REMOVER 5 Sheets-Sheet 2 FiledMarch 14, 1951 Q Q?" INVENTOR. @orge mlwiferzzw WM NW% 7 Sept 15,. 1953e. W. WALLENIUS CORE CAP REMOVER 3 Sheets-Sheet 3 Filed March 14, 1951JNVENIOR. emye Wiizz BY Patented Sept. 15, 1953 UNITED STATES PATENTOFFICE CORE CAP REMOVER George W. Wallenius, Turners Falls, Mass, as-

signor to International Paper Company, New York, N. Y., a corporation ofNew York Application March 14, 1951, Serial No. 215,533

3 Claims. 1

This invention relates to new and useful improvements in the removal ofcaps or tips from paper cores, and particularly seeks to provide novelapparatus for removing the caps from paper cores in such a manner thatthe caps will not be damaged and can be reused.

Heavy paper cores are used throughout the paper industry as the windingcenters for paper rolls. Metal caps are forced tightly onto the coreends, and an indentation of the cap meshes into a slot in the core sothat the core will not turn within the cap. The indentation in the capis further used to receive a key from the winding mechanism to transmitdriving power to the core.

The paper cores are long and cumbersome to handle in shipment or storageso that reuse is seldom practiced. However, the core caps are relativelysmall so that shipping or storage problems are minute compared to thecores, making it desirable to reuse them if a method to remove the capsfrom the cores is economically feasible.

Heretofore the practice has been either to discard the used cores andcaps or to separate the core stubs with the caps and collect them forreuse. In the latter case a collection of core stubs and caps is madeand ignited in the open. After the paper core is burned or charredsufficiently the remainder of the core is removed from the cap manually.Two serious disadvantages in this method have arisen. First, since thecores are thick and tightly wound they are difficult to ignite even withan independent fuel. Second, some damage is invariably done to the capsso that generally a cap cannot be reused after two or three burnings.This leads to further waste because the efficiency of the operation willgenerally be below 70% on each such recovery.

Therefore it is an object of this invention to provide a core capremover which will effect the removal of core caps from core stubs inundamaged condition for reuse.

is also an object of this invention to provide a core cap remover inwhich manual labor is reduced to a minimum.

It is another object of this invention to provide a core cap remover ofthe character described which includes pins to hold the core, to insertthe pins in the core, and a plunger to force the cap from the core.

It is a further object of this invention to provide a core cap removerof the character described, including a clamping ring, radiallyextending movable pins carried by the clamping ring, compression springsmounted on the pins,

and engaged against portions of the clamping ring to retract the pins, acam ring to control the movement of the pins, and cam grooves located inthe cam ring, each groove corresponding to a pin so that rotation of thecam ring causes a radial movement of the pins.

Another object of this invention is to provide a core cap remover of thecharacter described in which the plunger body fits snugly within thecorebody, a plunger tip fits snugly within the cap and the interveningplunger shoulder abuts against the edge of the cap.

A further object of this invention is to provide a core cap remover ofthe character described in which the plunger is driven forward by adoubleaction piston to force the cap from the core stub, the capremoved, and the plunger retracted by the piston to be in position torepeat the cycle.

With these and other objects in view, the nature of which will be moreapparent, the invention will be more fully understood by reference tothe drawings, the accompanying detailed description and the appendedclaims.

In the drawings,

Fig. 1 is a front end elevation, partly in sec tion, of a core capremover constructed in accordance with this invention;

Fig. 2 is a vertical, longitudinal section thereof;

Fig. 3 is a vertical section similar to Fig. 2, but showing only theclamping assembly at the time a core cap is about to be removed from thecore stub; and

Fig. 4 is a vertical section similar to Figs. 2 and 3 showing the corecap fully removed from the core stub.

Referring to the drawings in detail, this invention as illustrated isembodied in a core cap remover particularly adapted for removing metalcaps from paper cores and utilizing compressed air through adouble-acting piston and cylinder.

Integral with a mounting plate ID is a cylinder block H which containsin a cylinder bore !2 a piston l3 provided with a plurality of pistonrings I l. A plunger [5 extends forward from the piston to a point wherethe core stubs are to be placed as described hereinafter. The rear endof the plunger l5 has a reduced end It which fits through an opening inthe center of the piston l 3 and is secured to the piston by a nut l1.Attached to the front of the cylinder block by a plurality of bolts l8and nuts 19 is a cylinder head 25 which is provided with an extension 2|that fits closely around the plunger l5. The annular recess inthe'cylinder head 20 defined by the extension 2i and the plunger 15 islined with strips or" packing 22 which are held in position by anadjustable gland 23 secured to the cylinder head by a plurality of studs24 and nuts 25. The cylinder block is provided with a forward air inlet26 and a rear air inlet 2'! which are connected to an air supply andcontrol valve (not shown) of any type satisfactory to drive adouble-acting piston. ihe cylinder head may be provided with an oil duct23 which is closed with a plug 29. The oil duct may be used to lubricatethe piston in the event that a lubricant should not be mixed with theair entering the cylinder. The mounting plate IE! is mounted on asuitable supporting base (not shown).

Extending forward from the cylinder head is another series of relativelylong studs 30 and a clamping ring 3i is attached thereto by a pluralityof bolts 32 threaded into the respective studs through an extension 33of the clamping ring 3|. The forward portion of the clamping ring is ofreduced diameter to define a peripheral shoulder upon which is movablymounted a cam ring 34. The inner surface of the cam ring 34 which isadjacent the outer surface of the clampin ring 3! is provided with aplurality of rounded cam grooves 35 which are spirally disposed withrespect to the ring centers. Each groove 35 is provided with an arcuateslot 35a (see Fig. 2) to facilitate the positioning or removal of thecam ring as on the extension 33 of the mounting ring. The outer surfaceof the cam ring 3d is provided with a plurality of extensions 33, eachof which is provided with a socket 37 to receive a removable turninglever 38. A locking ring 39 is secured to the clamping ring 3| by aplurality of bolts 48 and abuts against both the clamping ring 3! andcam ring 34, holding the latter in position on the reduced diameterportion of the clamping ring. The locking ring 39 is generally tightenedto the extent that the cam ring 34 is easily rtated with the lever butremains at rest when the operator discontinues the rotation.

The clamping ring 3| i provided with a plurality of radially disposedbores 4| including a reduced diameter portion adjacent the inner ringsurface and a larger diameter portion adjacent the outer ring surfacethus forming an intermediate shoulder 42. The bores are in register withand equal in number to the cam grooves 35 of the cam ring 34. Each boreand cam groove unit is provided with a movable pin generally indicatedat 43 and which includes a pointed end 44, a body and an enlargedsemi-spheroidal head 46. Each pin body 45 fits smoothly within theassociated reduced bore portion while the pin head fits smoothly withinthe enlarged bore portion and also is engaged within the associated camgroove 35. A helical compression spring 41 is mounted on the pn body 45and extends between the bore shoulder 42 and the expanded pin'head &5.When the pin is spring-retracted into the fullest depth of the camgroove 35 the pin point 44 is in alignment with the internal surface ofthe clamping ring 3 i.

Removably attached to the front of the plunger 55 by a bolt 48 is aplunger head 43, the front portion of which or plunger tip 50 is ofslightly reduced diameter, thus forming a shoulder having a depthapproximately equal to the wall thickness of the core caps to be removedas hereinafter described. The plunger head 43 will generally befabricated from tool steel so that the shoulder El can withstandrepeated usage.

In operation a core stub 52 which carries a cap 53 tightly attached isplaced on the plunger as shown in Fig. 2. The plunger tip 50 fits snuglywithin the cap 53 while the remainder of the plunger head 49 fits snuglywithin the core stub 52 and the inner end 54 of the cap wall abutsagainst the shoulder 5| of the plunger head. The internal diameter ofthe clamping ring 3| is slightly larger than the outside diameter of thecore stub 52 and cap 53 so that the core stub and cap can be easilyplaced within the ring. During this portion of the operation the camring 34 is set so that the deepest part of the cam grooves 35 are overthe pin heads 46 and the pins 43 are spring retracted by the springs 41so that the pin points 44 are even with the internal surface of theclamping ring 3|.

After placement of the core stub and cap on the plunger the cam ring 34i rotated manually, by using the lever 33, toward the shallow end of thecam grooves 35. The pins 43 are thus cam-propelled towards the centerand the pointed ends 44 pierce the core stub for a sufficient distanceto hold it firmly, as shown in Fig. 3.

The piston I3 is then moved forward by allowing compressed air to enterthe rear air inlet 2'! while air is allowed to exhaust through theforward inlet 25 to force the plunger 15 forward, thus forcibly slidingthe cap 53 from its engagement with the core stub 52. The cap is thentaken from the plunger tip 53 and the air controls are reversed to forcethe piston l3 and plunger l5 back to the initial position shown in Fig.2.

The cam ring 34 is then returned to its resting position and the springs41 are strong enough to retract the pins 43 from the core stub. Then thecore stub is removed and the apparatus is ready to repeat the cycle.

Thus it will be seen that the invention herein disclosed provides a corecap remover wherein the core stub is securely clamped and a tightlyfitted plunger forces the cap to be disengaged from the core withoutdamage to the cap.

It is, of course, to be understood that various details of arrangementsand proportions of parts may be modified within the scope of theappended claims.

I claim:

1. In a machine to remove internally skirted core caps from hollowcores, a stationary clamping ring provided with a plurality of radiallydisposed bores, a cam rin rotatably mounted on said clamping ring andprovided with a plurality of inwardly disposed spiral cams numericallycorresponding to and aligned with said bores, a plurality of pinsprovided with retracting springs mounted in said bores and projectableby said cams to firmly hold the end of the core in preparation for theremoval of the cap therefrom, a plunger having a diameter substantiallyequal to the inside diameter of said core and receivable within the coreheld by said pins and being provided at its outer end with a portion ofreduced diameter whereby to form an abutment shoulder engageable withthe internal skirted portion of said cap, and means to reciprocate saidplunger along the axis of said clamping ring.

2. In a machine to remove internally skirted core caps from hollowcores, a stationary clamping ring provided with a plurality of radiallydisposed bores, a cam ring rotatably mounted on said clamping ring andprovided with a plurality of inwardly disposed spiral cams numericallycorresponding to and aligned with said bores, a plurality of pinsprovided with retracting springs mounted in said bores and projectableby said cams to firmly hold the end of the core in prep aration for theremoval of the cap therefrom, means to rotate said cam ring, a lockingring attached to said clamping ring to frictionally maintain setpositions of said cam ring, a plunger having a diameter substantiallyequal to the inside diameter of said core and receivable within the coreheld by said pins and being provided at its outer end with a portion ofreduced diameter whereby to form an abutment shoulder engageable withthe internal skirted portion of said cap, and means to reciprocate saidplunger along the axis of said clamping ring.

3. A machine to remove internally skirted core caps from hollow cores,comprising a base, a cylinder block fastened on said base and includinga cylinder head, a double acting piston, a plunger attached to saidpiston and extending through said cylinder head, means for actuatingsaid piston, and a clamping assembly attached to and extending beyondsaid cylinder head and including a clamping ring provided with aplurality of radially disposed bores, a cam ring rotatably mounted onsaid clamping ring and provided with 20 a plurality of inwardly disposedspiral cams numerically corresponding to and aligned with said bores, aplurality of pins provided with retracting springs mounted in said boresand projectable by said cams to firmly hold the end of the core inpreparation for the removal of the cap therefrom, means to rotate saidcam ring, rotation in one direction effecting propulsion of said pinsinwardly toward the center and rotation in the opposite directionallowing said springs to retract said pins, and a locking ring attachedto said clamping ring to frictionally maintain set positions of said camring, the plunger having a diameter substantially equal to the insidediameter of said core and receivable Within the core held by saidclamping ring and being provided at its outer end with a portion ofreduced diameter whereby to form an abutment shoulder engageable withthe internal skirted portion of said cap.

GEORGE W. WALLENIUS.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 160,696 Morse Mar. 9, 1875 1,633,593 Larbalester -1 June 28,1927 1,634,600 Thompson July 5, 1927 1,692,274 Malloy et a1. Nov. 20,1928 1,819,973 Richardson et a1. Aug. 18, 1 1

